16 HBAR Barrel .750 medium contour

16" AR-15 M-16 Lightweight Barrel made of 4140 Steel 1X9 Twist and Chambered in 5.56 NATO and this barrel will fire both .223 or 5.56mm Ammo.  This barrel is .750" diameter Medium contour and comes with standard A-2 Front sight tower or Picatinny rail gas block.